Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Effects of handicraft sitting postures on lower trunk muscle fatigue.

Authors
Areeudomwong-P; Puntumetakul-R; Kaber-DB; Wanpen-S; Leelayuwat-N; Chatchawan-U
Source
Ergonomics 2012 Jun; 55(6):693-703
NIOSHTIC No.
20041525
Abstract
The purpose of this study was to assess trunk muscle fatigue in seated handicraft tasks using surface electromyography (sEMG) and visual analogue scale (VAS) ratings for trunk discomfort, and to assess the relationship of these responses. Twenty-three participants were randomly assigned to assumed crossed-leg and heel sitting postures for 30 min. Normalised median frequency (NMF) slopes for lumbar multifidus (LM) and internal oblique (IO) muscles and VAS ratings were recorded. Results revealed that the crossed-leg posture produced significantly steeper NMF slopes for both sides of the LM and IO muscles than heel sitting. Greater VAS ratings were found in crossed-leg sitting posture than the heel sitting posture. The NMF slopes and the VAS ratings had significant negative correlations for both postures. Findings support heel sitting in handicraft tasks over crossed-leg sitting due to greater trunk muscle fatigue and discomfort during the latter posture. Results support VAS ratings as a complementary method to sEMG for identifying trunk muscle fatigue. Practitioner Summary: Trunk muscle fatigue in handicraft work is a potential risk for low back pain. Based on EMG and discomfort analyses, heel sitting is preferred to crossed-leg posture. Discomfort ratings are consistent with EMG measures in identifying trunk muscle fatigue in such postures.
Keywords
Ergonomics; Age-groups; Humans; Men; Women; Musculoskeletal-system; Muscles; Muscle-function; Fatigue; Exposure-levels; Physiology; Physiological-fatigue; Physiological-effects; Posture; Risk-factors; Statistical-analysis; Author Keywords: trunk muscle fatigue; body discomfort; surface electromyography; visual analogue scale; normalised median frequency slope
CODEN
ERGOAX
Publication Date
20120601
Document Type
Journal Article
Email Address
rungthip@kku.ac.th
Funding Type
Grant
Fiscal Year
2012
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-OH-008673; B10152012
Issue of Publication
6
ISSN
0014-0139
Source Name
Ergonomics
State
NC
Performing Organization
University of North Carolina, Chapel Hill, North Carolina
TOP